Measure content performance. Develop and improve products. List of Partners vendors. Congestion is a general term that refers to a feeling of stuffiness in the nasal or breathing passageways. Nasal congestion, stuffiness, or a runny nose is generally caused by increased blood volume to the vessels that line the passages inside the nose. Sinus congestion refers to a feeling of fullness in the sinuses.
These conditions can occur together or separately. Both may correlate with excess mucus or phlegm. Nasal congestion, or a runny nose, is annoying but common. Causes of nasal congestion include infections usually caused by viruses and allergies to grass, pet dander, foods or other substances.
It can be treated with medications called decongestants such as pseudoephedrine or antihistamines like diphenhydramine depending on the cause. Sinus congestion also sometimes called sinusitis results in a feeling of fullness in the face especially around the eyes, cheeks, and forehead.
It can cause severe headaches. It sometimes causes a post-nasal drip. Some cases can go on for weeks but most cases resolve on their own. More rarely an antibiotic needs to be prescribed. Both nasal and sinus congestion are most often caused by viral infections, however, there are other causes that may need to be evaluated.
In a congested network, response time slows with reduced network throughput. Congestion occurs when bandwidth is insufficient and network data traffic exceeds capacity. Data packet loss from congestion is partially countered by aggressive network protocol retransmission, which maintains a network congestion state after reducing the initial data load. This can create two stable states under the same data traffic load - one dealing with the initial load and the other maintaining reduced network throughput.
In modern networks, avoiding congestive collapse involves the application of network congestion avoidance techniques along with congestion control, such as:. Congestion has been described as a fundamental effect of limited network resources, especially router processing time and link throughput. Traffic directing processes, performed by routers on the Internet and other networks, use a microprocessor. Cumulative router processing time greatly impacts network congestion.
In fact, intermediate routers may actually discard data packets when they exceed its handling capability. Regardless, an NPM can tell you when a device is draining bandwidth above the expected level. Some NPMs allow you to monitor bandwidth usage in real-time, meaning you can detect when a bandwidth hog is using resources.
Sometimes, the congestion is the fault of how your network is designed. Your network layout needs to be optimized to ensure every part of your network is connected, but also to maximize performance across every area of coverage. When you divide your network into subnets, it should be done to accommodate for the devices you know will be on the network.
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